-40.9% is the change from 863 to 510
Calculation steps:
[( 510 - 863 ) ÷ 863] x 100 = -40.9%
Formula
Percentage change = [(510 - 863) / 863] x 100
Subtract the new number by the original number
510 - 863 = -353
-353 ÷ 863 = -0.40903823870220163
-0.40903823870220163 x 100 = -40.9%